ML20151X443

PNO-76-003:on 760107,explosion Occurred in off-gas Bldg During Normal Power Operations.Licensee Believes That Explosion Caused by build-up of off-gases in off-gas Bldg Due to Some Type of Blockage in Stack

ML20151X443
Person / Time
Site:	Cooper
Issue date:	01/07/1976
From:	Bidinger G, Jennifer Davis, Thornburg H NRC OFFICE OF INSPECTION & ENFORCEMENT (IE)
To:
References
PNO-76-003, PNO-76-3, NUDOCS 9809170093
Download: ML20151X443 (1)

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. , . y~ Jcau:ry 7, 1976 l

(' D R ev) J:4 h, 1 PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE -PNO-76-03  :

nt This prelininary notification constitutes EARLY notice of events of f.+ $ )n ]l-

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POSSIBLE safety or public interest significance. The information presented is as initially received without verification or evaluation and is basically all that is known by OIE staff as of 1:00 p.m. on  ;

date of this notification. IT SHOULD BE SPECIFICALLY NOTED THAT THIS i NOTIFICATION MAY CONTAIN INFORMATION THAT LATER MAY BE DETERMINED TO {

~ BE INACCURATE OR IUCONSISTENT. AN OFFICE OF. INSPECTION AND ENFORCEMENT NOTIFICATION OF AN INCIDENT OR OCCURRENCE (BLUE SHEET) SUBSEQUENTLY (

WILL BE ISSUED IF WARIMNTED. .

j Licensee: Nebraska Public Power District Cooper Nuclear Station Brownville, Nebraska (Sop %g' )  !

Subject:

Explosion in Off-Gas Building  !

, At 5:30 a.m., January 7, 1976, an explosion occurred in the off-gas building l during normal power operations. There were no reported fatalities or i personnel injuries, no reported damage to safety related equipment, and there was no evidence that plant security was breached. The north end

• of.the off-gas building (small Butler Building) was severely damaged. '

The licensee believes that the explosion was caused by a build-up of off-  !

' gases in the off-gas building due to some type of blockage in the stack.

The licensee immediately scrammed the reactor following the explosion. '

Further investigation of the incident-is awaiting the arrival of a special investigation team from their corporate offices.

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.The licensee has conducted preliminary radiation and contamination surveys. On-site results are .not known by IE a't' thil7isia. 0ff-site -- -

readings were not above normal background.  !

i Nebraska Public Power District plans a press release. High public interest  ;

i - is expected.

Two inspectors are being dispatched to the site.

II:IV receiviid notification of this occurrence at 8:20 a.m., January 7, 4

1976, from the Station Superintendent. _ _g.._. .

Contact:

GHBidinger, IE x27261 EDThornburg, IE x27353 JGDavis, IE x27541 i

l Distribution:

Chairman Anders- Commissioner Mason S. J. Chilk, SECY Commissioner Gilinsky Commissioner Rowden G. F. Murphy, JCAE

, Commissioner Kennedy C. C. Kammerer, CA r

j L. V. Gossick, EDO D. F. Knuth, IE J. A. Harris, PA -

B. C. Rusche, NRR J. La Fleur, ISP T. J. McTiernan, AIA g a

K. R. Chapman, NMSS H. K. Shapar, ELD

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Transmitted: P Bldg 2

E St 2 h ; MNBB 2

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'i. PRELIMINARY NOTIFICATION - NOT FOR PUBLIC DISCLOSURE e 9909170093 760107 U u . PDR p

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